Late payments on U.S. home equity lines of credit rose to a 21-year high in the first quarter of 2008 due to continued stress in the housing market and general weakness in the economy, the American Bankers Association said Wednesday.

In its quarterly report on consumer borrowing, the bankers group said the percentage of home equity lines that were more than 30 days past due rose to 1.1 percent from 0.96 percent the prior quarter.